Valve mechanism



, R. l. FROST.

- VALVE MECHANISM. APPLICATlO N man DEC. 6, 1920.

Patented Apr. 4, 1922.

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UNITED STATES PATENT orries.

RALPH I. raos'r, or AUeUsrA, KANSAS, ASSIGNOR TO THE cm. W. BROWN & son

STATE BANK, TRUSTEE, or AUGUSTA, KANsAs.

VALVE vMli'lGEANISIM.

Specification of Letters Patent.

Patented Apr. 4, 1922.

To all whom it may concern:

Be it known that I, RALPH I. F ROST, a citizen of the United States, residing at Augusta, in the county of Butler and Stateof Kansas, have invented a certain new and useful Improvement in Valve Mechanisms, of Which the following is a specification.

My invention relates to improvements in valve mechanisms.

The object of my invention is to provide a novel valve mechanism which is simple in construction, cheap to make, which maybe readily assembled and dis-assembled, which will be easily opened and closed irrespective of the pressure to which it is subjected, and which is not liable to be clogged.

My invention provides further novel means for preventing iron rust and boiler scale from entering the valve casing and for the removal of such rust, dirt or scale as may be thus arrested.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing, which illustrates the preferred embodiment of my invention,

Fig. 1 is a vertical sectional View of my improved valve mechanism, taken on the line 11 of Fig. 3.

Fig. 2 is a vertical sectional view on the line 22 of'Fig. 3.

Fig. 3 is a horizontal section on the line 33 of Fig. 2.

Fig. 4 is a cross section on the line H of Fig. 2.

1 designates the body of a valve casing provided with a vertical passage 2, which is, preferably, of cylindrical form and which intersects and is encircled by a port 3 with which a lateral intake passage 4 is provided.

The body 1 is provided with a chamber 5 which communicates with the upper end of the passage 2 and which at its upper end is provided with a threaded opening 6 which is in alinement with the passage 2, and in which is fitted a removable closure comprising a screw plug 7.

Slidably fitted in the passage 2 and arranged to open and close the port 3 is a cylindrical valve 8, which is provided with a longitudinal opening 9 which communicates at its lower end with the passage 2 and at its upper end with the chamber 5.

- Equal areas at opposite ends of the valve 8 are exposed to fluid oscillatably mounted in a horizontal central opening which extends through a screw plu 13 removably fitted in a lateral threaded hole 14 in the body 1 and which communicates with the chamber 5. A stufiing collar 15 encircles the rock shaft 12, is fitted in a threaded hole in the outer end of the plug 13, and bears against packing 16 in said plug encircling the rock shaft 12. The rock shaft 12 is provided with a crank comprising a sleeve 17 mounted on the rock shaft 12 in the chamber 5 and held from turning on the rock shaft by a removable pin 18. The

sleeve 17 is provided with two lateral arms 19 which are disposed at opposite sides of the stem of the valve 8 and which are adapted to bear against the under side of the flange 11. The valve 8 is lifted to the open position against the pressure of the spring 10, when the rock shaft 12 is rocked in the proper direction by any suitable means, as by a crank 20 on the outer end of the rock shaft, the crank 20 having pivoted to it an operating member 21.

The lower end of the body 1 may be threaded and fitted into a threaded hole in a v conductor 22 to which steam or other fluid under pressure is to be supplied from the intake passage 4:. In and extending across the passage 4 is a screen 23, Fig. 2, which is held between two rings 24 and 25, the ring 25 being fitted in the body 1. Therings 24 and 25 and the screen 23 are held in place by means of an internally threaded collar 26 across the central passage of which extends the screen 23. The collar 26 is 179; movably attached to the body 1 in any desired manner, as by screws 27.

The collar 26 in its lower side is provided with a threaded clean out hole 28, which communicates with the central passage of the collar and which has removably mounted in it a screw plug 29. Interposed bethe chamber 5, thereby affording a pressure having a at the top of the valve 8 corresponding to the pressure against the lower end of the valve.

The screen 23 will prevent iron rust, scale and large particles entering the passage 2, so that the valve 8 will not become clogged. By removing the plug 29, the collar 26 may be cleaned.

The valve 8 may be readily removed, if desired, by withdrawing the plug 7, after which the pin 18 may be removed, so that the rock shaft 12 may he slipped out of the sleeve 17. The valve 8 may then be withdrawn through. the opening 6.

I do not limit my invention to the structure shown and described, as modifications, within the scope of the appended claims, may be made without departing from the spirit of m invention.

What I c aim is 1. In a valve mechanism, a valve casing assage and a chamber communicating wit one end of the passage andhaving an opening in alinement with the assage, the casing having a port intersected by said passage, a valve slidably fitted in said passage and arranged to open and close said 'with said passage, a c osure for the last named opening, a valve slidably fitted in said passage and arranged to open and close said port, a spring bearing against said .closure and said valve for closing the latter, and a rock shaft extending into said chamber and having means for engaging and opening the valve against the pressure of said spring, substantially as set forth.

3. In a valve mechanisn, a valve casing having a chamber, a passage communicating with the chamber, and a port encircling the passage, a valve slidably fitted in said passage and arranged to open and close said port and having a longitudinal opening communicating with said assage and with said chamber, opposite en 5 of the valve being provided with equal areas exposed to fluid pressure in the passage and chamber respectively, and means in said chamber for opening and closing said valve, substantially as set forth.

In testimony whereof I have signed my name to this specification.

RALPH I. FROST. 

